How to Install a Reverse Osmosis Water Filter | Ask This Old House

How to Install a Reverse Osmosis Water Filter | Ask This Old House



Ask This Old House plumbing and heating expert Richard Trethewey installs an under sink water filter that can remove most contaminants
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Time: 1 hour

Cost: $100

Skill Level: Moderate

Tools List for Installing a Reverse Osmosis Water Filter:
Adjustable Open Ended Wrench
Screwdriver

Shopping List:
Reverse Osmosis Filter
3⁄8” x 3⁄8” x 1⁄4” compression T fitting

Steps:
1. Before doing any plumbing work, turn off the water supply at the water main.
2. Mount the filters to the inside of the kitchen cabinet.
3. Remove the hand soap dispenser or side sprayer to allow for a hole for mounting the new faucet.
4. Pass the tubes through the mounting hole and connect them to the faucet base.
5. Mount the faucet base to the sink or counter using the supplied toggle bolt and a screwdriver.
6. Connect the water line to the faucet and attach the faucet to the faucet base.
7. Add the compression T fitting to the existing cold water supply to allow connection to the new water filter. Use a wrench to tighten the connections.
8. Install the drain adapter to the existing drain piping and connect the drain tubing to the new drain adapter. You may need to modify the existing drain piping.
9. Connect the final piece of tubing to the pressure tank and tuck the tank under the sink.
10. Turn back on the water supply.

Resources:
Richard installed the Twist and Lock Reverse Osmosis Filtration System, which is manufactured by GE Appliances ( available at home centers.

About Ask This Old House TV:
Homeowners have a virtual truckload of questions for us on smaller projects, and we’re ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers—and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O’Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.

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How to Install a Reverse Osmosis Water Filter | Ask This Old House

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How to Install a Water Filter Under the Sink | Ask This Old House

How to Install a Water Filter Under the Sink | Ask This Old House



Ask This Old House plumbing and heating expert Richard Trethewey travels to Los Angeles to update a water filter to preserve the look of a retro faucet.
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Time: 1 hour

Cost: $250

Skill Level: Beginner

Tools List for Installing a Water Filter:
Wrench [
Bucket [

Shopping List:
Water filtration system

Steps:
1. Start by shutting off the cold water line underneath the kitchen sink. The cold should always be to the right.
2. Open the faucet to release any cold water that’s in the line upstream of the shutoff valve.
3. Place a small bucket or tray underneath the cold water line underneath the sink to catch any extra water that might fall out. Then, break the water connection using a wrench.
4. Connect the adapter that comes with the kit to the hose.
5. Push the black tubing that also comes with the kit into the adapter on one end and the filter on the other. The back of the filter has images that indicate which pipe should receive which tube.
6. Connect the second adapter to the water shutoff valve. Push the black tubing that came from the filter to the shutoff.
7. Turn the water back on.
8. Run the sink for 5-10 minute increments according to the instructions that come with the kit to activate the carbon and fully filter the water.

Resources:
Richard installed the Advanced Water Filtration System, which is manufactured by Kube ( It comes with a kit of adapters and connectors so that it’s easy to connect it with whatever pipes you have underneath your sink. The only other tool required for installation is a wrench, which can be found at any home center.

The retro faucet the homeowner had in her kitchen is called the Dishmaster M76 Imperial Four ( which can still be found on the manufacturer’s website and on some third party sites.

About Ask This Old House TV:
Homeowners have a virtual truckload of questions for us on smaller projects, and we’re ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers—and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O’Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.

Follow This Old House and Ask This Old House:
Facebook:
Twitter:

Pinterest:
Instagram:

Tumblr:

For more on This Old House and Ask This Old House, visit us at:

How to Install a Water Filter Under the Sink | Ask This Old House

Original Video Source